CN102606938A

CN102606938A - Backlight device, image display device, and method of assembling backlight device

Info

Publication number: CN102606938A
Application number: CN2012100041676A
Authority: CN
Inventors: 增地重博
Original assignee: JVCKenwood Corp
Current assignee: JVCKenwood Corp
Priority date: 2011-01-18
Filing date: 2012-01-09
Publication date: 2012-07-25
Also published as: JP2012150946A; KR101318933B1; US20120182763A1; JP5617649B2; US8475032B2; KR20120083861A

Abstract

A backlight device, where expense reduction is promoted by standardizing lengths of LED boards to one type. The backlight device includes: a light guide plate(8); and LED boards(112) which are arranged facing end surfaces of side surface portions of the light guide plate (8)and on which LEDs introducing light to the light guide plate are mounted, wherein lengths of long sides of the LED boards arranged on long sides facing end surfaces (8a) in a long side direction of the light guide plate and lengths of long sides of the LED boards (112a,112d)arranged on short sides facing end surfaces in a short side direction of the light guide plate are all the same.

Description

The assemble method of backlight arrangement, image display device and backlight arrangement

Technical field

The present invention relates to a kind of backlight arrangement and possess the image display device of said backlight arrangement and the assemble method of backlight arrangement; Be particularly related to a plurality of light emitting diodes of a kind of use spot lights such as (LED); Through the side from LGP is surface feeding sputtering light, makes from the assemble method of backlight arrangement, image display device and the backlight arrangement of the back illumination bright dipping of display floater.

Background technology

In recent years, use display module such as liquid crystal panel to come the image display device of display image, for example display equipment and TV set device etc. are followed its picture maximization, require the thickness of image display device main body try one's best ultra-thinization, lightweight.In order to make the image display device main body realize ultra-thinization, lightweight, just be necessary to make that display module or the framework of most of capacity and weight in the main body that occupies image display device is inner realizes ultra-thinization, lightweight.And, if in display module, use liquid crystal panel, then need use backlight arrangement, in order to promote display module, realize that then ultra-thinization of said backlight arrangement also becomes an important problem to ultra-thinization development.

In order to make ultra-thinization of backlight arrangement, people have proposed the various schemes that on the end face of LGP, dispose the marginal ray formula back light source system of led light source.Through being configured in led light source the end face of LGP like this, make ultra-thin the changing into of backlight be possible.

As the marginal ray formula back light source system that with this LED is light source, for example the structure shown in the patent documentation 1 is disclosed.

The bottom of attending that in this patent documentation 1, has proposed in the subtend of LGP is on the end face, the scheme that the optical axis from light source is not overlapped LED element alternate configurations up and down.In this LED element group up and down, because the optical axis of the relative element of LED does not up and down overlap, the brightness of the central part of LGP does not have special uprising, and has eliminated the brightness irregularities on the LGP, therefore makes that LGP can be more luminous.

The prior art document

Patent documentation 1: Japanese Patent Laid is opened 2004-79488 communique, Fig. 4 to Fig. 6

Summary of the invention

Invent problem to be solved

But; The structure of disclosed back light source system does in the said patent documentation 1 in the past, on the end face on the both sides up and down of LGP or four limits, alternately disposes many pieces of led light sources, shown in Figure 11 as in the patent documentation 1; Because it is the LED substrate that the tellite of led light source is installed; Must be made according to other specification on each limit, not only the cost of LED substrate is high, and when manufacturing, assembling; On each LED substrate, install or need indivedual correspondences etc. during the assembled LED light source, therefore exist and take a lot of work and the high problem of cost.

And; Particularly as shown in Figure 4; Under the situation of both sides configuration led light source up and down; Compare with the end face of the dual-side of the LGP that does not dispose light source, disposed the thermal source that going up of light source cause by light source on the following end face and concentrated, the temperature of the edge part in the picture display face outside on the image display device main body is risen.Therefore, be necessary cooling measure is taked on the both sides that disposed light source, its result brings difficulty for ultra-thinization of image display device main body and narrowization of framework, or because of taking cooling measure to produce problems such as cost rising.

Therefore, problem to be solved by this invention is the assemble method that a kind of backlight arrangement, image display device and backlight arrangement are provided, in the marginal ray formula back light source system that with LED is light source; Can the length unification of LED substrate be one or both, can reach the purpose that reduces cost, and; Can be expeditiously at the end face configuration LED of LGP; Therefore, even take cooling measure, also can realize ultra-thinization or narrowization of framework of backlight or image display device main body; Simultaneously, through making lasting of led light source change the purpose that whole homogenising can realize prolonging the backlight life-span.

Solve the method for problem

The invention of claim 1 is a kind of backlight arrangement; It possesses LGP (8); And with end face (8a) configuration relatively of the lateral parts of said LGP (8); And be equipped with LED substrate (11) to the LED (12) of said optical plate (8) irradiates light; It is characterized in that; The length of the long side direction of LED substrate (110a, 110c, 111a, 111c) described in the said LED substrate (110a, 110c, 111a, 111c) that disposes on will the long limit relative with the end face (8a) of the long side direction of said LGP (8) is made as identical, and the length of the long side direction of LED substrate (110b, 110d, 111b, 111d) described in the said LED substrate (110b, 110d, 111b, 111d) that disposes on will the minor face relative with the end face (8a) of the short side direction of said LGP (8) is made as identical.

The invention of claim 2 is a kind of backlight arrangement; It possesses LGP (8); And with end face (8a) configuration relatively of the lateral parts of said LGP (8); And be equipped with LED substrate (11) to the LED (12) of said optical plate (8) irradiates light; It is characterized in that the length of the long side direction of all LED substrates all is made as identical in the said LED substrate (112b, 112d) that disposes on said LED substrate (112a, 112c) that disposes on will the long limit relative with the end face (8a) of the long side direction of said LGP (8) and the minor face relative with the end face (8a) of the short side direction of said LGP (8).

The invention of claim 3; It is claim 1 or the described backlight arrangement of claim 2; It is characterized in that; Said LED substrate (11) is said end face (8a) configuration on 4 limits on the said LGP (8) respectively, and with the long limit of end face (8a) subtend of the long side direction of said LGP (8) on, said LED substrate (110a, 110c, 111a, 111c, 112a, 112c) is configured on the said long limit relatively with alternately staggering; Make the axle of said long side direction not overlap; And on the minor face relative with the end face (8a) of the short side direction of said LGP, (110b, 110d, 111b, 111d, 112b, 112d) is configured on the aforementioned relative minor face with alternately staggering with said LED substrate, makes the axle of said short side direction not overlap.

The invention of claim 4; It is any described backlight arrangement in claim 1 to the claim 3; It is characterized in that, on the bight in four corners of said LGP (8), only disposed any one LED substrate in the LED substrate (110b, 110d, 111b, 111d, 112b, 112d) of LED substrate (110a, 110c, 111a, 111c, 112a, 112c) or said short side direction of said long side direction.

The invention of claim 5, it is any described backlight arrangement of claim 1 to claim 4, it is characterized in that, on the said end region that does not dispose said LED substrate (11), possesses radiating part (2RTa1～2RRd2).

The invention of claim 6; It is the described backlight arrangement of claim 5; It is characterized in that: it possesses maintaining part (2RTh, 2RBh, 2RLh, 2RRh), and said maintaining part is at radiating part (2RTa1～2RRd2) and in the gap of said LGP possess heat insulation structural.

The invention of claim 7 is display module (50), it is characterized in that, it possesses any described backlight arrangement and display module (4) in claim 1 to the claim 6, and this display module (4) has the display surface 4a of display image.

The invention of claim 8; It is for possessing LGP (8); And with end face (8a) configuration relatively of the lateral parts of said LGP (8); And be equipped with assemble method to the backlight arrangement of the substrate (11) of the LED (12) of said optical plate (8) irradiates light; It is characterized in that; Employed substrate does; The length of the long side direction of LED substrate (110a, 110c, 111a, 111c) is identical described in the said LED substrate (110a, 110c, 111a, 111c) that disposes on the long limit relative with the end face (8a) of the long side direction of said LGP (8), and the length of the long side direction of LED substrate (110b, 110d, 111b, 111d) described in the said LED substrate (110b, 110d, 111b, 111d) that disposes on the minor face relative with the end face (8a) of the short side direction of said LGP (8) is identical, and each limit of all directions of this LGP (8) is through unitized LED substrate (110a, 110c, 111a, 111c; Reach 110b, 110d, 111b, 111d); The said end face (8a) on 4 limits on the said LGP (8) disposes respectively, and with the long limit of the long side direction subtend of said LGP (8) on, the LED substrate (110a, 110c, 111a, 111c) that said warp is unitized is configured on the said relative long limit with alternately staggering; Make the axle of said long side direction not overlap; And with the minor face of the short side direction subtend of said LGP on, the LED substrate (110b, 110d, 111b, 111d) that said warp is unitized is configured on the aforementioned relative minor face with alternately staggering, makes the axle of said short side direction not overlap.

The invention of claim 9; It is for possessing LGP (8); And with end face (8a) configuration relatively of the lateral parts of said LGP (8); And be equipped with assemble method to the backlight arrangement of the LED substrate (11) of the LED (12) of said optical plate (8) irradiates light; It is characterized in that; Employed substrate does, the length of all LED substrate long side directions all is the identical unitized substrate of warp in the said LED substrate (112b, 112d) that disposes on said LED substrate (112a, 112c) that disposes on the long limit relative with the end face (8a) of the long side direction of said LGP (8) and the minor face relative with the end face (8a) of the short side direction of said LGP (8), and this said end face (8a) through 4 limits of unitized LED substrate (112a, 112c, 112b, 112d) on the said LGP (8) disposes respectively; And with the long limit of the long side direction subtend of (8) of said LGP on; The LED substrate (112a, 112c) that said warp is unitized is configured on the aforementioned relative long limit with alternately staggering, makes spool not the overlapping of said long side direction, and with the minor face of the short side direction subtend of said LGP on; The LED substrate (112b, 112d) that said warp is unitized is configured on the aforementioned relative minor face with alternately staggering, makes the axle of short side direction not overlap.

The invention effect

According to backlight arrangement of the present invention and image display device; The length of the long side direction of LED substrate is made as identical described in the LED substrate that disposes on will the long limit relative with the end face of the long side direction of LGP; And the length of the long side direction of LED substrate is made as identical described in the LED substrate that disposes on will the minor face relative with the end face of the short side direction of LGP; And be configured on the end face of LGP; Perhaps; Through the length of the long side direction of LED substrate is all unified for equal length and be configured on the end face of LGP, thereby specification unitized of LED substrate or led driver can be realized, the purpose of the cost of LED substrate or led driver and cooling measure etc. can be realized reducing.

And; Its structure is: the end face of LED substrate along 4 limits of LGP disposed respectively, and on the long limit relative with the long side direction of LGP, be configured in the LED substrate on the long limit of subtend with alternately staggering; Make the axle on the long side direction not overlap; And on the minor face relative, the LED substrate is configured on the minor face of subtend with alternately staggering, makes that the axle on the short side direction does not overlap with the short side direction of LGP.Therefore, the heat that is caused by light source is not concentrated on a part of limit, and because of thermal source is dispersed on 4 limits, the temperature that can suppress the frame part in the picture display face outside on the image display device rises, and the effect of the equalizing temperature that makes frame part is also arranged simultaneously.

And, because its structure is four jiaos at backlight, promptly; On the bight at four angles of LGP; Only dispose in the LED substrate of LED substrate or short side direction of long side direction any one LED substrate, so light quantity is not concentrated on the bight in four corners of LGP, can suppresses to concentrate the LED that causes and drive the deterioration of efficient because of heat; What make the whole led light source of backlight lasts variation homogenising, the life of product that can prolong backlight arrangement or image display device.

And its effect does, on the end face of LGP; To not disposing the zone of LED substrate; Be the position in the gap between the LED substrate, heat abstractor is set, thereby a kind of backlight arrangement and image display device of having realized ultra-thinization He narrowization of framework of image display device main body can be provided.

And, according to the assemble method of backlight arrangement of the present invention, on each limit of all directions of LGP; To dispose respectively through the end face of unitized LED substrate along 4 limits of LGP, perhaps, the complete unified equal length that is of the length of the long side direction of LED substrate; And the end face along LGP 4 limits disposes respectively, on the long limit relative with the long side direction of LGP, is configured in the LED substrate on the long limit of subtend with alternately staggering; Make the axle on the long side direction not overlap, and with the minor face of the short side direction subtend of LGP on, the LED substrate is configured on the minor face of subtend with alternately staggering; Make the axle on the short side direction not overlap; Therefore make, during assembling, can with LED is installed toward each LED substrate on or on the backlight arrangement operation of assembled LED substrate unitize, operation is become also can reach the purpose of the cost of reduction LED substrate or led driver and cooling measure etc. easily; And be not concentrated on a part of limit by the heat that light source causes; Because of thermal source is dispersed on 4 limits, the temperature that can suppress the frame part in the picture display face outside on the image display device main body rises, and can make the equalizing temperature of frame part simultaneously.

Description of drawings

(Fig. 1) perspective view of the integral body of the image display device of one of embodiment of the present invention formation.

Perspective view after (Fig. 2) above-mentioned image display device decomposes.

(Fig. 3) be used for the perspective view of the LED substrate of above-mentioned image display device.

(Fig. 4) show the perspective view of the installation constitution of above-mentioned LED substrate with a part of section.

(Fig. 5) profile of the pith of above-mentioned image display device.

(Fig. 6) the configuration formation of the LED substrate on the inner backlight arrangement of above-mentioned image display device and the wherein pie graph of an example of assemble method.

(Fig. 7) figure of the configuration of the LED substrate of easy-to-understand ground key diagram 6.

(Fig. 8) the wherein pie graph of an example of the pith of the backlight on the above-mentioned image display device.

(Fig. 9) show other a routine figure of configuration formation and assemble method of LED substrate on the inner backlight arrangement of above-mentioned image display device.

(Figure 10) figure of an example of the other configuration formation of the LED substrate on the backlight arrangement of the above-mentioned image display device of demonstration inside and assemble method.

The specific embodiment

With comparatively ideal embodiment, use Fig. 1 to Figure 10 that embodiment of the present invention is described.

Fig. 1 is the perspective view that the integral body of image display device of the present invention constitutes, and is the figure that sees from positive upper right side.At this, can see that the direction of display frame is called the front.

The display of the image display device 50 of this embodiment for showing from outside received image signal.And the size of picture is assumed to the above big molded dimension of 30 cun types, uses 42 cun types to describe in the present embodiment.And display floater is that example describes with the liquid crystal panel.

In Fig. 1, image display device 50 has the preceding side frame body 1 of frame shape and the framework of combining with back side frame body 23.

Framework 3 has been taken in liquid crystal panel 4, the outside of the peristome 1a of the rectangle that side frame body 1 was provided with before the display surface 4a of the image displaying part of liquid crystal panel 4 was exposed to.

And framework 3 is that the support of installing on the paper inboard of Fig. 15 supports by framework 3 dorsal surfaces, and image display device 50 can be arranged on the floor.And, take off support 5, through sprung parts is installed, can only hangs framework 3 on ceiling or also can it be provided with as wall hanging.

Preceding side frame body 1 is served as reasons and had upper ledge 1ue and the lower frame 1sT that extends to the part of holding about it, and is formed rectangular box-like with the left frame 1hd and the right frame 1m that link to each other that upper and lower frames 1ue, 1sT are connected on above-below direction.On this lower frame 1sT right-hand, be provided with remote control and receive the 1b of optical window portion.

And, though not shown, on the lower rear side of the back side frame body 2 of image display device 50, possess the LED-DRV substrate in the driving loop that is equipped with the driving LED light source and the time schedule controller substrate of the demonstration of control liquid crystal panel 4 etc.In addition, also carried substrate and the not shown power supply unit etc. in loop of the signal processing etc. of image display device 50, various substrate classes and power supply unit integral body are covered by the substrate lid.

Fig. 2 is the exploded view that is used for explaining image display device 50 of the present invention.

Image display device 50 structures are for beginning to have successively preceding side frame body 1, liquid crystal panel 4, optics board 6, panel chassis 7, LGP 8, reflecting plate 9 and back side frame body 2 from face side.

In addition, in Fig. 2, on liquid crystal panel 4 rear sides, constitute, the structure to rear frame 2 after the optics board 6 is a backlight arrangement.

And; In this embodiment; In order to make image display device 50 ultra-thinization, preceding side frame body 1 with back side frame body 2 all be and with the structure of the framework of image display device 50 and backlight arrangement, but it is not limited; Can separate with image display device 50 and backlight arrangement, constitute other framework separately.

Before side frame body 1 be to constitute by the frame shape that up and down 4 frame 1ue, 1sT, 1hd and 1mg constitute; The inboard of these 4 frame 1ue, 1sT, 1hd and 1mg; Be respectively equipped with rib 1RT, 1RB, 1RL, 1RR; In the rigidity of their side frame bodies 1 before reinforcement, the framework 3 inner heat that produce are dispelled the heat towards the outside of image display device 50 efficiently.

On bottom's end of the liquid crystal panel 4 of image display panel,, be connected with a pair of LCD-DRV substrate 10 that is equipped with the circuit that drives liquid crystal panel 4 via a flexible base, board 4f.

And 3 places on each limit on the right sides of liquid crystal panel 4 are extruded with laminar lug 4b respectively.

Panel chassis 7 is formed on resin and forms on the frame through injection mo(u)lding, on the corresponding position of lug 4b, in order not interfere this lug 4b, and be provided with the recess 7a of depression.

Back side frame body 2 contains substrate 2sk and the last shaft of rib 2RT that is installed in 4 shafts of rib on the substrate 2sk, time shaft of rib 2RB, left shaft of rib 2RL, right shaft of rib 2RR and constitutes.Through these 4 shaft of rib 2RT, 2RB, 2RL, 2RR are set, before reinforcement, in the rigidity of side frame body 1, the framework 3 inner heat that produce are dispelled the heat towards the outside of image display device 50 efficiently.

Substrate 2sk for example implements pressure processing etc. and forms on the aluminium sheet of thickness 1.0mm.The end on each limit is formed flange portion 2f to the face side bending.

At shaft of rib 2RT, 2RB, 2RL, 2RR, mutual right face on, promptly away from adjacent separately flange 2f one side LED substrate 11 shown in Figure 3 being set.

Being equipped with a plurality of light source leds 12 on the base substrate 11k of LED substrate 11 is light emitting diode.

Image display device 50 among the embodiment, as after state shown in Figure 5, through making the end face 8a incident of light that LED12 sends, and make liquid crystal panel luminous from the side surface part of LGP 8.

And LED substrate 11 is arranged on 4 limits with each corresponding position of end face 8a on the right sides of LGP 8 and limit up and down totally, respectively can be from 4 limits to inner incident light.

In addition, of the back, LED substrate 11 is not to surround whole up and down end face 8a of LGP 8 and be set up, but on relative long limit or minor face, is configured with alternately staggering.

Base substrate 11k is specifically as shown in Figure 3, and the long limit (La) of LED substrate is shorter than the long limit of the end face 8a of LGP 8, and the minor face of LED substrate 11 (Ha) is corresponding with the width of 8 subtend faces of LGP of shaft of rib and form the elongated board shape.

A plurality of LED12 link to each other on the long side direction of base substrate 11k, and are configured equally spacedly.A last positive electrode and the negative electrode of respectively being provided with respectively of LED12 through between these two electrodes, applying voltage, and lights LED12.And one of base substrate 11k is equipped with on distolateral and is used for the connector 13 that is connected with the LED-DRV substrate.

Fig. 4 shows the perspective view that LED substrate 11 is installed on shaft of rib 2RL state with a part of section.As shown in Figure 4, the erecting device as to each shaft of rib of LED substrate 11 for example, can use the adhesive tape 14 of thermal diffusivity.

Fig. 5 is the sectional view of the shaft of rib 2RL side on the image display device 50 of the present invention.

Liquid crystal panel 4 is configured via the mitigation material 15 on the panel chassis 7.LGP 8 is through transparent tabular components such as acrylics, to form than liquid crystal panel 4 bigger sizes.But,, also can form through other materials such as for example Merlon with the light uniformization of incident and the LGP 8 that radiates.

For with image display device 50 whole ultra-thinization, LGP 8 will adopt the thickness of the arbitrary value about 1mm～5mm.The whole inboard of LGP 8 covering liquid crystal panel 4 and be configured in the device rear side of liquid crystal panel 4.Optics board 6 is with light diffusing sheet or insults eyeglass etc. and cascade.Optics board 6 is configured between liquid crystal panel 4 and the LGP 8.

As stated, LED12 adopts the white light-emitting diode that penetrates white light.Be specially, the structure of LED12 is on the light-emitting area of the semiconductor light-emitting elements that sends blue light, and the range upon range of luminescent coating that receives exciting of blue light and penetrate sodium yellow forms.In view of the above, penetrate the white light of conduct from LED12 by the synthetic light of blue light and sodium yellow.But LED12 also can be on the light-emitting area of the semiconductor light-emitting elements that sends blue light, constitutes by the 1st luminescent coating of the red light that blue light inspired and by the 2nd luminescent coating of the green light that blue light inspired is range upon range of penetrating.In view of the above, also can obtain white light as the synthetic light of blue light, red light and green light.For the protection LED12 down of environment externally, by the few encapsulant of optics load, like transparency is high in the viewing area synthetic resin etc. with its sealing.

Form light mixing 16 in the space that is centered on by end face 8a, panel chassis 7 and the reflecting plate 9 of LED12, LGP 8.Light mixing 16 has injects the function of the end face 8a of LGP 8 while relaxing the inhomogeneous of its luminosity with it with the light that penetrates from LED12.The light that shoots out from LED12 is directly injected the end face 8a of LGP 8 through this light mixing 16, perhaps is reflected and after the inside on panel chassis 7 or reflecting plate 9, injects the end face 8a of LGP 8.Inject the light of the inside of LGP 8 from end face 8a, after this through reflecting plate 9 by scattered reflection, as uniform light, pass the inside that optics board 6 is irradiated to liquid crystal panel 4.At this moment, be applied with the processed of dot pattern etc. in the inside of LGP 8, make and only possibly hold up towards liquid crystal panel 4 with almost vertical angle from the light of LED12.

LED12 is as its function of spot light performance.Therefore the light of injecting the end face 8a of LGP 8 may produce by the caused luminosity of the configuration space of LED12 inhomogeneous.The distribution of the light that known LED12 launches forms circle.Therefore LED12 is changed to the interval H of LGP 8, this luminosity is inhomogeneous will to be increased and decreased thereupon.

In general, along with 8 interval H from LED12 to the LGP shortens, what be positioned at luminosity between LED1 lowly will become big, and luminosity is inhomogeneous also will to become big.On the other hand, along with 8 interval H from LED12 to the LGP broadens, luminosity is inhomogeneous will to diminish, but can reduce because of the average photometric of the light of the end face 8a that injects LGP 8 in reasons such as the diffusion of the light of light mixing 16 and absorptions.Therefore, must set interval H and make on average value of meeting the demands of the inhomogeneous and luminosity of the luminosity of end face 8a of LGP 8.LED12 can make interval H change all by under the situation of equidistant configuration, adopts to make the inhomogeneous interval H that becomes minimum of luminosity.

Fig. 6 is the configuration formation of the LED substrate 11 in the inner backlight arrangement of explanation image display device of the present invention 50 and the wherein pie graph of an example of assemble method.Fig. 7 is the figure of configuration of the LED substrate 11 of easy-to-understand ground key diagram 6.Among Fig. 6 or Fig. 7,, only illustrate LGP 8 and LED substrate 11, omit diagram with regard to other members for making explanation easy-to-understand.

In Fig. 6; Configuration LED substrate 110a1,110a2 on the end face 8a of the side surface part of the top of LGP 8; Configuration LED substrate 110b1,110b2 on the end face 8a of the side surface part on the left side of LGP 8; Configuration LED substrate 110c1,110c2 on the end face 8a of the side surface part of the bottom of LGP 8, configuration LED substrate 110d1,110d2 on the end face 8a of the side surface part on the right of LGP 8.

Therefore, on the device as shown in Figure 6, respectively the light of led light source is injected LGP 8 from these 4 limits because of on 4 corresponding limits of each end face 8a on the limit up and down of LGP 8, having disposed LED substrate 11, having made.

Moreover the thickness T h thickness of LED substrate 110a1,110a2,110b1,110b2,110c1,110c2,110d1,110d2 is as shown in Figure 5, for as the aggregate thickness of base substrate 11k with the LED12 that is mounted, is same thickness.

The LED substrate 110a1 of top, 110a2 and following LED substrate 110c1, the structure of 110c2 do, disposed many pieces of duplicate substrates, and promptly the LED substrate of same size disposes each 2 pieces among Fig. 6.

That is, the length of the long side direction of the LED substrate of LED substrate 110a and LED substrate 110c is identical length, and the installation piece number of LED12 is identical in each LED substrate, and each LED12 is by equidistantly configuration.

Moreover; The LED substrate 110c1 of the LED substrate 110a1 of top, 110a2 and bottom, 110c2 are shown in the dotted portion of Fig. 7 downside; On the long limit relative with the long side direction of LGP 8; LED substrate 110a, 110c are configured on the relative long limit with alternately staggering, make not overlap with the axle of long side direction.Moreover, what is called alternately with staggering configuration be meant, with the end of LED substrate 110a1 and LED substrate 110c1 each other not subtend (relative position) be configured to the best, but the part of the end of each substrate also can subtend.And in the side side on the long limit of LGP 8; The long edge lengths that disposes substrate is than the long edge lengths of LGP 8 little 1 piece or many piece the 1st LED substrate 110a1,110a2; On other sides on the long limit of LGP 8, dispose 1 piece of perhaps LED substrate 110a1,110a2 of many pieces the 2nd.Make it not overlap with the 1st LED substrate 110a1,110a2.At this, after, the axle of long side direction is meant, with the relative long limit of end face 8a of the long side direction of LGP 8, short side direction spool be meant the relative minor face of end face 8a with the short side direction of LGP 8.

Moreover, with the length sum of the length of the long side direction of the LED substrate 110a1 of top, 110a2 and the long side direction of following LED substrate 110a1,110a2 as with the equal length of length on the one side on LGP 8 long limits.

The LED substrate 110a1 on LED substrate 110a1,110a2 and the right on the left side, the structure of 110a2 do, dispose many pieces of identical substrates both with specification through unitized LED substrate, dispose each 2 pieces among Fig. 6.

That is, LED substrate 110b and LED substrate 110d do, the length of the long side direction of LED substrate is identical, and the installation piece number of LED12 is identical in each LED substrate, and each LED12 is with equidistant configuration.

And; LED substrate 110a1, the 110a2 on LED substrate 110a1,110a2 and the right on the left side do; Shown in the dotted portion in Fig. 7 left side, on the minor face relative, with LED substrate 110b with the short side direction of LGP 8; 110d is configured on the relative minor face with alternately staggering, makes not overlap with the axle of short side direction.

Moreover, with the length sum of the short side direction of the LED substrate 110d1 on the length of the short side direction of the LED substrate 110b1 on the left side, 110b2 and the right, 110d2 as with the identical length of length on one side of LGP 8 minor faces.

Therefore, the summation of the length of LED substrate 110a～110d does in Fig. 6, the relative end face 8a of the side surface part of LGP 8, the identical length from long limit during on one side with on one side total 2 limit incident lights of minor face.

And, as shown in Figure 6, because of LED substrate 110a or LED substrate 110c and LED substrate 110b or LED substrate 110d are not the substrates of same size, so the length of the long side direction of LED substrate is different.

That is, the structure of embodiment as shown in Figure 6 does, is that two kinds of specifications are configured with 11 unifications of LED substrate.

In view of the above; Make, during assembling, to each LED substrate 11 assembled LED 12, or the work of the LED substrate of on backlight arrangement, assembling 11 is unitized already that operation is carried out easily; Simultaneously, can reach the purpose of the cost that reduces LED substrate 11 or led driver and cooling measure etc.

And in the example of Fig. 6, though will be disposed at long side up and down and piece number of the LED substrate 11 about short brink unitized respectively by 2 pieces, be not limited to this.

And; Be respectively up and down or about short brink that LED12 respectively as equidistantly having unified pitch arrays, but is not limited to this with the LED substrate 11 of uniform specificationization with long side; For example; Can be to every piece of unitized substrate, the spacing width of change LED12, or can be changed into unequal pitch arrays.

In Fig. 6, shown the embodiment of the length of LED substrate 110a or LED substrate 110c, but the length of LED substrate 110a also can be less than the length of LED substrate 110b greater than the length of LED substrate 110b or LED substrate 110d.

In the present embodiment, the bight in four corners of LGP 8 only disposes arbitrary one piece of LED substrate 11 in the LED substrate 11 of LED substrate 11 or short side direction of long side direction.

Particularly, the LED substrate 110b1 of configuration short brink on the 17a of the upper left corner, the LED substrate 110c1 of configuration long side on the 17b of the lower left corner, the LED substrate 110d2 of configuration short brink on the 17c of the lower right corner.

Moreover the configuration of LED substrate 11 constitutes an example that is not limited to Fig. 6, and for example, on the 17a of the upper left corner, the LED substrate 110a1 that also can dispose long limit replaces the LED substrate 110b1 of configuration short brink.

As above; Through disposing LED substrate 11 at the facial end face 8a of 4 avris of LGP 8; The heat that causes because of led light source can not concentrate on part limit portion, and thermal source is scattered in 4 limits, and the temperature that therefore can suppress the frame part in the picture display face outside in the image display device main body rises; Simultaneously, but the equalizing temperature of implementation framework part.

And, four jiaos of backlight, that is, the bight 17a～17d in four corners of LGP 8 can not concentrate heat, can suppress to concentrate the LED that causes because of heat and drive the deterioration of efficient.

In view of the above, the LED that can suppress the local area lasts the deterioration of variation, thus led light source last variation all by homogenising the time; The driving efficient of LED also becomes kilter on the whole; Help the energy-conservation of backlight arrangement and image display device 50, simultaneously, also can prolong life of product.

Fig. 8 is the pie graph of an example of the pith of the backlight in the demonstration image display device of the present invention.In Fig. 8, for ease of explanation, the frame part on a graphic panel chassis 7.

In Fig. 8,, in the time of the use same-sign, will suitably omit for the main explanation of LED substrate 11 because of identical with Fig. 6 at the LED substrate 11 of the end face 8a of the side surface part of LGP 8 configuration.

Fig. 6 omits for convenience's sake and specifies, and like the explanation among Fig. 4, LED substrate 11 is for being bonded in each shaft of rib 2RT through gluing member 14,2RL, and 2RB, the state of 2RR is mounted.

In Fig. 8; LED substrate 110a1 and LED substrate 110a2 are installed on the shaft of rib 2RT; LED substrate 110b1 and LED substrate 110b2 are installed on the left shaft of rib 2RL; LED substrate 110c1 and LED substrate 110c2 are installed in down on the shaft of rib 2RB, and LED substrate 110d1 and LED substrate 110d2 are installed on the right shaft of rib 2RR.

And among the end face 8a of the side surface part of LGP 8, at the end region that does not dispose LED substrate 11, what having that bonding states that the heating to led light source of shaft of rib dispels the heat after being installed on appends heat abstractor, i.e. radiating part.

Install shaft of rib with respect to last shaft of rib 2RT and append heat abstractor 2RTa1,2RTa2; With respect to left shaft of rib 2RT left shaft of rib is installed and is appended heat abstractor 2RLb1,2RLb2; Append heat abstractor 2RBc1,2RBc2 with respect to shaft of rib under shaft of rib 2RB installs down; With respect to right shaft of rib 2RR right shaft of rib is installed and is appended heat abstractor 2RRd1,2RRd2, each thickness that appends heat abstractor is identical with the thickness T h of LED substrate 110.

Moreover; In the example of Fig. 8, what will engage with shaft of rib appends heat abstractor as individual member, but also can be used as appending heat abstractor and the integrated member of shaft of rib structure; And, also can be used as appending heat abstractor and LED substrate and the integrated member of shaft of rib structure.

Further,, can be provided for the position of lightguide plate fixing 8, make the spacing between LGP 8 and the LED12 keep certain holding device, i.e. maintaining part in the gap of appending between heat abstractor and the LGP 8.

Moreover holding device is to possess the structure that disconnected heat constitutes, and makes heat can not be delivered to LGP 8.

The structure of the example of Fig. 8 does; Append heat abstractor 2RTa2 bonding with respect to last shaft of rib holding device 2RTh is installed; Append heat abstractor 2RLb1 bonding with respect to left shaft of rib holding device 2RLh is installed; Append heat abstractor 2RBc1 bonding with respect to following shaft of rib holding device 2RBh is installed, append heat abstractor 2RRd2 bonding with respect to right shaft of rib holding device 2RRh is installed.

Moreover the position of appending the holding device of installing on the heat abstractor is not confined to this, can it be installed in appending on the heat abstractor of other position yet.

As above; The facial end face 8a configuration LED substrate 11 of 4 avris of LGP 8 and on relative long limit and minor face, alternately dispose with staggering; Make LED substrate 11 not overlap with the long side direction of LGP 8 or each of short side direction; Thereby the heat that light source causes can not concentrate on part limit portion, when thermal source is scattered in 4 limit portions, will reduce by half with respect to the contact area of the LED substrate 11 of each shaft of rib 2RT, 2RB, 2RL, 2RR; Therefore the radiating effect of each shaft of rib 2RT, 2RB, 2RL, 2RR will increase, and the temperature that can suppress the frame part in the picture display face outside rises.

And in the end face 8a of LGP 8, the field that does not dispose LED substrate 11, promptly; Field with respect to 11 of LED substrates; Through possessing the heat abstractor that appends, can realize further improving the whole radiating effect of shaft of rib, and can the temperature of frame part be controlled at scope and homogenising.

In view of the above, the outer frame portion on panel chassis 7 is diminished becomes possibility, therefore can realize narrowization of framework of backlight.And, also can reduce heat dissipation capacity towards the backlight depth direction, when can realizing ultra-thinization of backlight, the cost that can as far as possible suppress to produce because of cooling measure rises.

Being suitable for of this embodiment through above-mentioned explanation can provide ultra-thinization that realize the image display device main body or the backlight arrangement of narrowization of framework, the assemble method of image display device 50 and backlight arrangement.

Fig. 9 and Figure 10 are that other configurations of the LED substrate 11 of the backlight arrangement that shows that image display device of the present invention 50 is inner constitute and the figure of assemble method one example.

Fig. 9 be be disposed at long side up and down piece number of the LED substrate 11 of Ge Bian be decided to be 4 pieces respectively; Piece number of the LED substrate 11 that is disposed at short brink left and right sides Ge Bian is decided to be 3 pieces respectively, the configuration piece number of the LED substrate 11 of long side and short brink is made as anisomerous formation example figure.

The structure of Fig. 6 and Fig. 8 one example does; With the configuration piece number of the LED substrate 11 of long side and short brink is same piece number; But formation like Fig. 9 one example; Under the length condition of different of the length on long limit and minor face, corresponding its length, piece number of the LED substrate that can be suitably each limit be disposed is made as different numbers.

In one of Fig. 9 routine structure do; Also same with the example of Fig. 6; The LED substrate 111a1 of top, 111a2,111a3,111a4 and following LED substrate 111c1,111c2,111c3,111c4 do; Dispose many pieces of identical substrates, be about to specification through unitized LED substrate, configuration is each 4 pieces in Fig. 9.

That is, the length of the long side direction of LED substrate 111a and LED substrate 111c all is identical length, and the installation piece number of the LED12 in each LED substrate is identical, and each LED12 is equidistantly to be configured.

And on the long limit relative with the long side direction of LGP 8, LED substrate 11 is configured on the relative long limit with alternately staggering, make not overlap with the axle of long side direction.

Moreover, with the summation of the length of the long side direction of the LED substrate 111a1 of top, 111a2,111a3,111a4 and the length of the long side direction of following LED substrate 111c1,111c2,111c3,111c4 as with the identical length of length on the one side on LGP 8 long limits.

Further, the structure of the LED substrate 111d1 on LED substrate 111b1,111b2,111b3 and the right on the left side, 111d2,111d3 does, disposes many pieces of identical substrates, is about to specification through unitized LED substrate, disposes each 3 pieces among Fig. 9.

That is, the length of the long side direction of the LED substrate of LED substrate 111b and LED substrate 111d is identical, and the installation number of LED12 is identical in each LED substrate, and each LED12 is with equidistant configuration.

And on the minor face relative, dispose the LED substrate with the short side direction of LGP 8 with on relative minor face, alternately staggering, make not overlap with the axle of short side direction.

And, with the summation of the length of the short side direction of the LED substrate 1111d1 on the length of the short side direction of the LED substrate 111b1 on the left side, 111b2,111b3 and the right, 111d2,111d3 as with the identical length of length on the one side on LGP 8 long limits.

Therefore, the summation of the length of LED substrate does in Fig. 9, the equal length during to the end face 8a incident light of the side surface part of LGP 8 with meter 2 limits on minor face one side on one side from long limit.

And as shown in Figure 9, LED substrate 111a or LED substrate 111c and LED substrate 111b or LED substrate 111d are not the substrates of same size, so the length of the long side direction of LED substrate is different.

That is, the structure of embodiment as shown in Figure 9 does, is that the substrate of two kinds of specifications disposes with 11 unifications of LED substrate.

In view of the above, make, during assembling, to each LED substrate assembled LED, or the work of the LED substrate of on backlight arrangement, assembling is unitized already can make operation easy, and can reach the purpose of the cost that reduces LED substrate or led driver and cooling measure etc.

In the example of Fig. 9, the same with the example of Fig. 6, the bight 17a～17d in four corners of LGP 8 only disposes any one piece of LED substrate in the LED substrate of LED substrate or short side direction of long side direction.

Particularly; The LED substrate 111b1 of configuration short brink on the 17a of the upper left corner; The LED substrate 111c1 of configuration long side on the 17b of the lower left corner, the LED substrate 111d3 of configuration short brink on the 17c of the lower right corner, the LED substrate 111a4 of configuration short brink on the 17d of the upper right corner.

Moreover; Perhaps be respectively up and down that LED12 respectively as equidistantly unified its spacing array, still is not limited to this with specification about short brink with long side through unitized LED substrate 11; For example; Can be to the unitized substrate of every piece of warp, the spacing width of change LED12, or variable more uneven pitch arrays.

As above; Through disposing LED substrate 11 at the facial end face 8a of 4 avris of LGP 8; The heat that causes because of led light source can not concentrate on part limit portion; Thermal source is scattered in 4 limits, when can suppress the temperature rising of the frame part outside the picture display face in the image display device main body, but the equalizing temperature of implementation framework part.

In view of the above; The LED12 that can suppress the local area lasts the deterioration of variation, thus led light source last variation on the whole by homogenising the time, the driving efficient of LED12 also can whole realize kilter; Help the energy-conservation of backlight arrangement or image display device 50, and also can prolong life of product.

Figure 10 is; LED substrate 11 and the LED substrate 11 that is disposed at short brink left and right sides Ge Bian with Ge Bian about the long side that is disposed at LGP 8; Through using the promptly whole unified a kind of substrates of specification that are of identical substrate; Make the length (La) of the long side direction of LED substrate 11 be made as equal length, be disposed at the formation example of the end face 8a of LGP 8.

At Figure 10 be, the vertical-horizontal proportion of LGP 8 is an example of 16: 9, and piece number that is disposed at the LED substrate on long side each limit up and down is 16 pieces, and piece number that is disposed at the LED substrate 11 of short brink left and right sides Ge Bian is 9 pieces.

So; Through the length of the long side direction of LED substrate 11 is all unified for identical length and be disposed at the end face 8a of LGP 8; Making, during assembling, improving to LED substrate 11 and installed or the operating efficiency of assembled LED light source the time, also can efficiently LED substrate 11 be disposed at the end face 8a of LGP 8; Therefore the design efficiency of LED substrate 11 and led driver can be improved, the purpose of the cost of LED substrate 11 or led driver can be realized reducing.

Moreover long side all through unitized LED substrate 11 does up and down and about person's short brink, and LED12 all as equidistantly having unified pitch arrays, but is limited to this, and for example, also can LED12 be unified is the LED substrate of spacing array inequality.

In the formation example in Fig. 9 and Figure 10; Constitute through same suitable heat radiation as shown in Figure 8; Ultra-thinization that can realize backlight arrangement and narrowization of framework simultaneously, also can suppress the cost rising that the cooling measure because of backlight arrangement and image display device causes as far as possible.

As stated, through using this embodiment, ultra-thinization that realized image display device main body assemble method with backlight arrangement, image display device 50 and the backlight arrangement of narrowization of framework can be provided.

Moreover embodiments of the invention are not limited to above-mentioned formation and structure, and are also applicable for the formation of in the scope that does not break away from aim of the present invention, being out of shape, and this is mathematical.

And in the present embodiment, be White LED with light source, but be not limited thereto that for example, the formation that has disposed RGB monochromatic LED of all kinds is also applicable.

[symbol description]

Side frame body before 1

2 back side frame bodies

2RTa1, the last shaft of rib of 2RTa2 append heat abstractor (radiating part)

Shaft of rib appends heat abstractor (radiating part) under 2RBc1, the 2RBc2

2RLb1,2RLb2 left side shaft of rib append heat abstractor (radiating part)

2RRd1, the right shaft of rib of 2RRd2 append heat abstractor (radiating part)

2RTh, 2RBh, 2RLh, 2RRh holding device (maintaining part)

3 frameworks

4 liquid crystal panels (display floater)

The 4a display surface

8 LGPs

The 8a end face

11 LED substrates

110a1,110a2 LED substrate

110b1,110b2 LED substrate

110c1,110c2 LED substrate

110d1,110d2 LED substrate

111a1,111a2,111a3,111a4 LED substrate

111b1,111b2,111b3 LED substrate

111c1,111c2,111c3,111c4 LED substrate

1111d1,111d2,111d3 LED substrate

112a1,112a2,112a3,112a4 LED substrate

112a5,112a6,112a7,112a8 LED substrate

112b1,112b2,112b3,112b4,112b5 LED substrate

112c1,112c2,112c3,112c4 LED substrate

112c5,112c6,112c7,112c8 LED substrate

112d1,112d2,112d3,112d4 LED substrate

The 11k base substrate

12 LED

The bight in 17a, 17b, 17c, four corners of 17d

50 image display devices

Claims

1. backlight arrangement; It possesses LGP; And dispose relatively with the end face of the lateral parts of said LGP; And be equipped with and make light incide the LED substrate of the LED of said LGP; It is characterized in that the length of the long side direction of LED substrate described in the said LED substrate that disposes on will the long limit relative with the end face of the long side direction of said LGP is made as identical, and the length of the long side direction of LED substrate described in the said LED substrate that disposes on will the minor face relative with the end face of the short side direction of said LGP is made as identical.

2. backlight arrangement; It possesses LGP; And dispose relatively with the end face of the lateral parts of said LGP; And be equipped with and make light incide the LED substrate of the LED of said LGP, it is characterized in that, the length of the long side direction of all LED substrates is made as identical in the said LED substrate that disposes on said LED substrate that disposes on will the long limit relative with the end face of the long side direction of said LGP and the minor face relative with the end face of the short side direction of said LGP.

3. like claim 1 or the described backlight arrangement of claim 2; It is characterized in that; Said LED substrate is the said end face configuration on 4 limits on the said LGP respectively, and on the long limit relative with the end face of the long side direction of said LGP, said LED substrate is configured on the said long limit relatively with alternately staggering; Make and do not overlap with the axle of said long side direction; And on the minor face relative, said LED substrate is configured on the said relative minor face with alternately staggering, makes and spool not the overlapping of said short side direction with the end face of the short side direction of said LGP.

4. like any described backlight arrangement in claim 1 to the claim 3; It is characterized in that, on the bight in four corners of said LGP, only dispose in the LED substrate of LED substrate or said short side direction of said long side direction any one LED substrate.

5. any described backlight arrangement in claim 1 to the claim 4 is characterized in that, possesses radiating part not disposing on the said end region of said LED substrate.

6. the described backlight arrangement of claim 5 is characterized in that it possesses maintaining part, and said maintaining part possesses heat insulation structural in the gap of said radiating part and said LGP.

7. an image display device is characterized in that, possesses any described backlight arrangement and display module in claim 1 to the claim 6, and this display module has the display surface of display image.

8. the assemble method of a backlight arrangement, this backlight arrangement possesses LGP, and disposes relatively with the end face of the lateral parts of said LGP, and is equipped with and makes light incide the LED substrate of the LED of said LGP, and said assemble method is characterised in that,

Employed substrate does; The length of the long side direction of LED substrate is identical described in the said LED substrate that disposes on the long limit relative with the end face of the long side direction of said LGP; And the length of the long side direction of LED substrate is identical described in the said LED substrate that disposes on the minor face relative with the end face of the short side direction of said LGP

Each limit of all directions of this LGP is through unitized LED substrate; The said end face on 4 limits on the said LGP disposes respectively; And on the long limit relative with the end face of the long side direction of said LGP; The LED substrate that said warp is unitized is configured on the said relative long limit with alternately staggering, makes and spool not the overlapping of said long side direction, and on the minor face relative with the end face of the short side direction of said LGP; The LED substrate that said warp is unitized is configured on the said relative minor face with alternately staggering, makes not overlap with the axle of said short side direction.

9. the assemble method of a backlight arrangement, this backlight arrangement possesses LGP, and disposes relatively with the end face of the lateral parts of said LGP, and is equipped with and makes light incide the LED substrate of the LED of said LGP, and said assemble method is characterised in that,

Employed substrate does; The length of all LED substrate long side directions is the identical unitized substrate of warp in the said LED substrate that disposes on said LED substrate that disposes on the long limit relative with the end face of the long side direction of said LGP and the minor face relative with the end face of the short side direction of said LGP

This said end face through 4 limits of unitized LED substrate on the said LGP disposes respectively; And on the long limit relative with the end face of the long side direction of said LGP; The LED substrate that said warp is unitized is configured on the said relative long limit with alternately staggering; Make and do not overlap with the axle of said long side direction; And on the minor face relative with the end face of the short side direction of said LGP, the LED substrate that said warp is unitized is configured on the said relative minor face with alternately staggering, makes and spool not the overlapping of said short side direction.